Industrial
Hygienic
Instrumentation

 


ThinkTop® DIGITAL  8-30  VDC PNP/NPN


IMPLEMENTATION
Alfa Laval ThinkTop® control head has been designed to ensure optimum valve control when used with butterfly, single seat and Mixproof valves and is compatible with all major PLC systems (Programmable Logic Control Systems with PNP/NPN Interface). It is used for food, dairy, beverage and pharmaceutical applications.

OPERATION PRINCIPLE
ThinkTop® is a control head with indication units and a solenoid valve that is used to control any process valve. It is used to control and manage pneumatic valves and installed on the valve.  It receives signals to control the valve from the PLC system and sends feedback signal to the PLC system to indicate the position of the valve. The user installs the ThinkTop® using the remote control (separately ordered) or the buttons on the head to adapt the sensor card to a specific valve or application. Demounting the top unit is not necessary if a remote control is used.



TECHNICAL DATA

Communication interface ..................... Digital
Power Supply Voltage .......................... 8-30 VDC
Sensor card power supply .................... 24 VDC, 1W
Feedback signal #1 .............................. Closed Valve
Feedback signal #2 .............................. Open Valve
Feedback signal #3 .............................. 1. Seat or 1 External signal
Feedback signal #4 .............................. 2 Seat or 1
External signal
Feedback signal #5 .............................. Status
Valve tolerance band............................. 1-5
Default tolerance band.......................... +- 5 mm
Sensor precision................................... +- 0.1 mm
Hit size ................................................. 0.1-80 mm
Solenoid valve power supply ............... 24 VDC +- 10%, 1W
Air supply.............................................. 300-900 kPa (3-9) bar
Solenoid types...................................... 3/2 way or 5/2 way
Number of Solenoids ........................... 0-3
Manual handle ..................................... Available
Jack Fittings ......................................... Ø6 mm




PHYSICAL DATA 

Material
Plastic parts ............................... Reinforced Nylon
Steel parts .................................. 304 and 316 stainless steel
Gaskets ...................................... Nitrile (NBR) rubber
Operating Temperature .............. -20  °C - +85 °C
Protection Class ......................... IP66 and IP67

Cable Connection
Main Cable union........................ PG11 (Ø4-Ø10 mm)
External sensor cable union ....... PG7 (Ø3-Ø6.5  mm)
Max. Cable diameter .................. 0.75 mm2 (AWG 20)













Test conditions: 1 feedback signal active 1 ThinkTop®  (open)




When no solenoid valve is open
24 VDC Power Supply Voltage
  30 mA
When 1 solenoid valve is open
24 VDC Power Supply Voltage
  75 mA
When 2 solenoid valve is open
24 VDC Power Supply Voltage
120 mA
When 3 solenoid valve is open
24 VDC Power Supply Voltage
165 mA


ELECTRICAL CONNECTION


























Power Supply Connection Example:



A. Jumper positive in solenoid valve activation


B. Jumper negative in solenoid valve activation







1. External body
2. N/A
3. Screw
4. Washer
5. Sensor card
6. Solenoid valve*
7. PT Screw

  8. Base
  9. Special X-ring, gray
10. Air fitting
11. Discharge valve
12. Threaded Plug (PG7)
13. Cable union,  PG11
14. Air outlet

15. Adapter
16. Special X-ring, black
17. “O” ring
18. Allen screw
19. Special X-ring
20. Indicator needle



*6a: Selenoid valve (3/2)
*6b: Selenoid valve (3/2 or 5/2)





OPTIONS
- 5 m PVC control cable 12 x 0.5 mm2, (AWG 20); 9611993627
- Air outlet adapter (Figure 1. Basic Design pos. 14)
  For models before ThinkTop® 2006 November; item code: 9613431501



ACCESSORIES
- IR keyboard
- External PNP Sensors
- Main union PG11
- PG7 cable union for external sensors
- External sensor bracket for Unique Mixproof


SIZES and ITEM NUMBERS

Product Code: 5403


Please note the following when placing an order.
- Number of solenoid valves (0-3)
- Solenoid valve type (3/2 or 5/2)
- Air jack installation 6 mm or 1/4”
- Please indicate if you will use it for 700 series of valves
- Special indication needle for SSV-LS valves; 9613158101 Unique
- Special indication needle 9612637001 for SRC-LS Stop valves at size 63.5-101.6 mm/DN 65-100



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